Is 875 the same as 21K?

Yes. 875, 21K, 21ct all denote the same material — 87.5% gold. Different markets and eras stamp it differently, but the purity is identical.

How much is 875 worth?

Its melt value is the gold spot price × 0.875 × the weight in grams. Buyers then deduct roughly 5–15% for refining and margin, so a quoted buy-back price sits a little below that theoretical figure.

How do I confirm a 875 stamp is genuine?

Look at the mark under 10× magnification for crisp, even strikes, cross-check the weight-to-volume ratio against the expected density (17 g/cm³ for this alloy), scan it with the Jewelry Identifier app, and — when it matters — have an XRF test done by an assay office or gemological lab.

* Gold hallmark

The 875 hallmark: meaning, purity & value

21-karat gold (87.5%). Standard in Saudi Arabia, UAE, Egypt, and broader Gulf region. Compromise between K22 softness and K18 alloy-feel.

Published May 30, 2026

Quick facts

Metal: Gold
Purity: 87.5%
Fineness: 875/1000
Karat: 21K
Common regions: ME
Density: 17 g/cm³
Melting point: 970 °C
Standard: ISO 9202

Stamps that mean the same thing

This purity may be struck into jewelry as any of: 875 / 21K / 21ct. The mark differs by country and era, but the metal content is identical.

What 875 tells you

21-karat gold (87.5%). Standard in Saudi Arabia, UAE, Egypt, and broader Gulf region. Compromise between K22 softness and K18 alloy-feel.

How to value it

The melt value of a 875 piece is gold spot price × 0.875 × weight (g). A buyer typically deducts 5–15% for assay, refining, and margin, so the cash offer lands just under that figure. Stones and complex settings are usually excluded from the metal weight.

How to check it yourself

Examine the stamp under a 10× loupe — genuine marks are crisp and evenly struck, not doubled or smeared.
Confirm the mark reads 875 or an equivalent such as 21K.
Weigh the piece and estimate its volume — the density should land near 17 g/cm³ for this alloy.
Photograph it in the Jewelry Identifier app to read the metal, hallmark, and any gemstones from the image.
For a binding result, have an assay office or gemological lab run an XRF purity test.

Sources

Dubai Central Laboratory

* Frequently asked

FAQ

Q. Is 875 the same as 21K?: A. Yes. 875, 21K, 21ct all denote the same material — 87.5% gold. Different markets and eras stamp it differently, but the purity is identical.
Q. How much is 875 worth?: A. Its melt value is the gold spot price × 0.875 × the weight in grams. Buyers then deduct roughly 5–15% for refining and margin, so a quoted buy-back price sits a little below that theoretical figure.
Q. How do I confirm a 875 stamp is genuine?: A. Look at the mark under 10× magnification for crisp, even strikes, cross-check the weight-to-volume ratio against the expected density (17 g/cm³ for this alloy), scan it with the Jewelry Identifier app, and — when it matters — have an XRF test done by an assay office or gemological lab.

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